Electric switch



N UNITED STATES HARRY KIRTLEY, on MELCHER, Iowa.v

PATENT OFFICE.

ELECTmc SWITCH.

To all @hom it may concern.'

Be 1t knownV that l, HARRY KIRTLEY, a

citizen of the United States,` residing `at Melcher, in the county ot Marion and State of Iowa, have invented a certain new and usef'ul Electric Switch, oi which theytol-V lowing is a specification.

. The object of my invention is to provide an electric switch adapted to be operated by the opening and closing of an ordinaryv dOor, the switch being ot simple construction, very durable and comparatively cheap.

More particularly my inventionrelates to a device for 'making and break-ing an electric circuit, which is designed to be operated 'by the opening'and closing ot a door adja` cent tothe switch.

Still another object is to provide in such a device'means for locking the switch in position where the circuit will be held broken. Y

Still another object is to provide in such a device means whereby the opening and closing of the door will not effect the circuit. With thesel and other objects in view, my invention consists 7 in the construction,` arrangement and combination of the various parts of mydevice, whereby the objects contemplated are attained, as hereinafter more kt'ully set forth, pointed out in my claims,

and illustrated in the accompanying drawings in which:

Figure 1 is a front elevation ot my switch installed adjacent 'to a door casing, parts being shownin section tobetter illustrate the construction. n,

Figure 2 is a front elevation ot the switch with the front plate removed therefrom.

Figure 3 is a front elevation showing the switchin another olf-its positions.

Figure l is a' front elevation showing the switch in another otits positions.

Figure 5 is a central, sectional viewV taken on the line 5-5 ot Figure 3.

Figure 6 is a horizontal, sectional view taken on the line G-G of Figure 1; and

Figure 7 is a detail, sectional -view taken on theline 7-7 of Figure 2;

In the accompanying drawings I have used the reference numeral 10 to indicate an ordinary switch casing which is suitably mounted in thewall 11. The wall 11 is provided with the door Acasing 12. A portion of a door 13 is shown in Figure 6 ot'the drawings in section;

Spccication of Letters Patent.v Patented A1313 11, 1922 Application inea January 3,1921. serial no. 434,595.

The casing 10 is provided with a front removable cover plate 111 whichliis held in position by the screws`15. The casing 10 is l held-to the wall 11by means ot the screws 16. Electric wires 17 and 18 extend through insulated bushings 19 into the casing 1i). Fixed in the casing 10 are the pair ot binding posts 2O and 21 to which are fastened the wires 17 and 18respectively. The binding posts 2O and 21 are insulated from the ing 10. y

Fixed to the binding post 2O is the L- shaped arm or contact member 22 which has its eXtreme lower edge slit as at 23. The purpose of which will be `hereafter more lully set forth. Y

A short link 241 is tixed to the binding post 21 and has pivotedV to its lower end a swinging arm or contact member 25. The `contact member 25 is received betweenthe slit'ends 23 of the member Q2, and completes the elec-l trical circuit. Y

A spring member 26 is provided for yield,`

' end tor yieldinglyholding it at one limit of its movement. The link 28 is piv'oted at 30.

A bolt device 31 is pivotally tixedV to the link 23 intermediateot' its ends and extends through an opening 32 in the wall of the casing 10.` The bolt device 31 extends through an opening 33 formed in the door casing 12.

The outer or'free end oi" the bolt device 31 is provided with a cam member 35. The doorl casing 12 is provided with an opening Soto receive the cam member 35 when in one of its positions. Y n

A plate 3T is set in a recess in the door casing 12 and forms a guide for the cam member 35. The door` 13 .is provided with a plate 38 against which the camv member strikes, thus preventing any wear upon the wooden door. l Y

From the construction of the partsfjust described it will be seen that the spring 29 will yieldingly hold. the cam member pro-V liected out beyond the edge ot the door casing' lwhen the door is open. But when the door is closed the striking of the door :wainet the cam member Si? 'will canse the bolt device 3l to be moved inwardly against the action el? the s iningj 2S).

livotally lined to the lower end of the .link 28 is the arm 39. The arm 39 ie provided with a notch 2:0 in itis lower edge. A guide member -l-l fixed to the casing l0 and exy tende over the armV 39 So that the arm 3U is lree to swing in the guide l.

A pawl l2 .is piroted to the caeing and designed when in one position to co-act with the notch el() in the arm 3,9 for holding; it in its raised position .Caibstantially afl-is illustrated in .lf`ignre ol the drawings. lilhen in this position the free end ol the rm 39 will abut against the insulated blocl: on the Contact menioer stop fl?) limite the downward increment ot the pewl 42.

ln order to raise the pawl :troni the goein tion shown in Figures f2 and l et the drawings to petition where it will engage tl e notch l0 l une a l'cey 1li-1l which extents through an openiinggv in the cover plate 141.

The key when it rotated will Strike against the 4pawl Al). an illustrated in dotted linee in Figures El, 2l and land cause. the pawl to be rained until the pawl engages the notch ell) and becon'ies locked tliereby.

rihe movement of the pawl and engage ment el' the notch fl() may be accoinpliehed only when the cam l5 entendeI out beyond 'the edge oi" the door cae ng l2. That ie when the contaiift nienibere 22 and are in ein j gafemcnt 'with each other.

it will be :wen that 'when the erin ifi raieed or pl; l in the poeition where it will :ibut 'againzit the insulated hloclr :El that the circuit is not ailected thereby. i when the door ll clos-feu it www the boit device 2li to be moved inwardly thue moving the arm 39 inwardly and causing the conlict nicnib i and f2.5 to become lisenf been mored to canne the circuit. to bee` n.

. l olien the pawl lf3 will dro, den tu il; Y)mal position.

li'lie'i the door in :again opened the bolt device 8l will be n'loved outwardly permitting; i he foutent members to again become engaged Ytor coinpletini;q a circuit.

The arm 39 will then drop downwardly aro that its upper edge will be below lhe lower edge ot the ineulated block The oifieningj and closing oll the door when in thin position will not eltcct the contact inembers, The moving of the arm S9 to the poeition nhown in dotted lines in ll`igure i3 will not cause the insulated block QT to bccome engaged.

.lt will thun be eeen that il: the contact meinbeie are in enneigement that in order lo canse thein to become dieengaged it '.f: neceesziirj.' to have the. pawl 1l-i5 in engagement with the notch lo..

lllhen it desired to permanently lock the contact membe out olf engagement l have provided a stop device del: which .is Slidably mounted in the gni de members l5. An arm le which has a head on its outer end extends through a slot l-T in the cover plate let.

Vhen it is desired to permanently lock the contact members out el" engagement the partev are iii-st moved to the position shown in yFigure 3 of the drawings7 then the Inovingoit the bolt device 3l inwardly will cause the contact membere to become disengaged for permitting the Stop device to be moved upwardly so that it resteI against the link 28 and prevents the spring 2!) from returning` it to its normal position.

It will be eeen that I have provided. a device so adapted that when the door iis closed the electric circuit will be broken, but upon the opening of the door the circuit will be completed and alter once completed the opening)l and closing ot the door will not eil'eet the circuit, until the key .4r-4:" again used to move the pawl ft2 into engagmenii with the .notch 411i).

lt will. also be seen that l am able to loci; the contact members in position permanently where no coniplete circuit will be had.

,ly setting the device the door may be closed in the evening)A and the light will then be put out by the act of closing the door and upon returning' to the lieur'fe1 the incre opening olf the door will cause the circuit to be completed and the lights lit( (lh-anges may be mede in the coimtrnction and errangei'nent oli the parts ol my machine 'without departing` lrom the realV .enh-it and pnrpoee ol my inrern'iion7 and it isi my intention to cover by my claims, anyY modified iorine ot structure or une oli' mechanical equivalente, which may be reasv'mably included within their scope. l

i claim as my invention:

l.. in. a device olf the class described including a pa ir o l coi'itact members` yieli'liniflv held in engagement, a .link nivoted at one end, an arm pivcted to its; other cud and adapted when in one poi-ation to throw said contact membew out o l engagement willi each otherD a bolt device lxedito :Said linl; whereby movement ol"l the bolt dcvire will inni-art movement to the link and a Kev actuated piwl lor holding' said arm 4in poiltion where movement ol` the bolt device will cause the contact members to be disengaged.

ln a device oli' the class described inclit/.ling a pair oilE emitact ineinber` yieldin held in engagement. a link pivotcd ali oneA end, an arm pivoted to itaA other end and adapted when in one position to throw :mid Contact membin's out ol" engagien'leiit willi Vach other, a bolt device fixed to Said linl; whereby movement ol the bolt device will impart nioveinent to the link and a lfey ac- CTI tuatedpawl ior holding said arm in position where movement of the bolt device will causeL adapted when in one position to throw said contact members ont of engagement with each other, means for yieldingly holding said link in one of its positions, a bolt device fixed to said linkwliereby movement of ,the

bolt device will impart movement to the link and a key actuated pawl for holding said arm in position where movement of the bolt device will cause the contact members to be disengaged.

4. In a device of the class described including a pair of contact members yieldingly held in engagement, a link pivoted at one end, an arm pivoted to its other end and adapted when in one position to throw said contact members out of engagement with each other, a bolt deviceiixed to said link whereby movement of the bolt device will impart movement to the link, a notch in said arm and a key actuated pawl adapted to coact withfsaid notch Jfor holding the arm in position where movement of it in a predetermined direction will cause the contact members to become disengaged.

5. In a device of the class described including a pair of contact members yield'- ingly held in engagement, a link pivoted at one end, an arm pivoted to its other end and adapted when in one position to throw said contact members out of engagement with each other, a bolt device fixed to said link and adapted to extend through a door casing, a cam on the free end of said bolt device, means for yieldingly holding said cam out beyond the door casing, when the door is open, means for holding said arm in position where its 'movement will disengage the contact members, the parts being so arranged that closing of the door will cause the bolt device to move said arm for disengaging the contact members. .Y

6. In a device of the class described 'including a pair of contact members yieldingly held in engagement, a link pivoted atr one end, an arm pivoted to its other end and adapted when in one position to throw said contact members out oi engagement with each other, a bolt device fixed to said link and adapted to extend through a door casing, a cam on the free endof said bolt device, means for yieldingly holding said cam out beyond the door casing when the door is open, means for holding said arm in position where its movement will disengage the contact members, the parts being so arranged that closing of the door will cause the bolt device to move said arm for discrigaging the contact members, and means for locking said arm in position where the contact members will be'disengaged regardless of the position of the door.

7. In a device of the class described including a pair of contact members yieldingly held in engagement, a link pivoted at one end, an arm pivoted to its other end and adapted when in one position to throw said contact members out of engagement with each other, a bolt device fixed to said link and adapted to extend through a door casing, a cam on the free end of said device, means for yieldingly holding said cam out beyond the door casing-when the door is open, whereby the closing of a door against the cam will cause said bolt device to be moved, means for holding said arm in position where its movement will disengage the'contact members, the parts being so arranged that when said last means are inoperative the movement of the bolt will not effect the contact members.

8. In a device .of the class described including a pair of contact members yieldingly held in engagement, a link pivoted at one end, an arm pivoted to its other end and adapted when in one position to throw said contact members out of engagement with each other, a bolt device fixed to said link and adapted to extend through a door casing, a cam on the free end of said bolt device, means for yieldingly holding said cam out beyond the door casing when'the door is open whereby the closing of a door against the cam will cause said bolt device to be moved, means forholding said arm in position where its movement will disengage the contact members, the parts being so arranged that when the contact members are disengaged by the closing of the door theyT` will be held disengaged while the door is closed and when the door is opened the contact members will become engaged and :turther movement of the locking bolt will not eiect said contact members.

9. In a device of the class described including a pair of contact members yieldingly held in engagement, a link pivoted at one end, an arm pivoted toits other end and adapted when in one position to throw said contact members out of engagement with each other, a guide member for the free end of said arm, a bolt device fixed to said link whereby movement of the bolt device will impart movement to the link and a key actuated pawl for holding said arm in position where movement of the bolt device n Will cause the contact members to be disengaged.

Des Moines, Iowa, October Q7, 1920.

HARRY KIRTLEY. 

